Re: PAC7302 short datasheet from PixArt

2010-01-31 Thread Jean-Francois Moine
On Sat, 30 Jan 2010 14:56:56 -0600 (CST)
Theodore Kilgore kilg...@banach.math.auburn.edu wrote:

 First, I am glad that mouse-copying reproduces the accent in your
 name. If you can help explain how to reproduce such things by typing
 while using apine over an ssh connection, using a standard US
 keyboard, I would be glad of the explanation. My wife is Hungarian,
 and I am thus very sensitized to the importance of the question, how
 to do the accents required for writing Hungarian properly.

Hello Theodore,

I am also using a US keyboard and I have no problem with accents and
utf-8.

You must define the character encoding to 'UTF-8' and the font codeset
to 'Lat2' (central Europe). The locale must be set to 'en_US.UTF-8'.
Eventually, you may use the compose mechanism setting the compose
character to a specific key.

In Debian, this in done at installation time, but it may be changed by
dpkg-reconfigure or by hand.

The character encoding and the font codeset are in the
file /etc/default/console-setup. The locale is defined in the
file /etc/default/locale.

For the keyboard, in X, I set the 'compose' keyboard option to 'rwin',
i.e. the right 'ms-windows' key. This is defined in the
file /etc/default/keyboard or /etc/default/console-setup:
XKBOPTIONS=compose:rwin
To insert a composed character, press/release left-rwin, then the accent
and then the character. The compose sequences may be found in the file
/etc/console-setup/compose.ISO-8859-2.inc.

Cheers.

-- 
Ken ar c'hentañ | ** Breizh ha Linux atav! **
Jef |   http://moinejf.free.fr/
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Re: PAC7302 short datasheet from PixArt

2010-01-31 Thread Németh Márton
Hi,
Theodore Kilgore wrote:
 
 On Sat, 30 Jan 2010, Németh Márton wrote:
 
 Hi,

 if anyone interested there is a brief overview datasheet about
 PixArt PAC7301/PAC7302 at
 http://www.pixart.com.tw/upload/PAC7301_7302%20%20Spec%20V1_20091228174030.pdf

 [...]

 Now, as to the substance of the mail above, thanks a lot. I had a bunch of 
 the PixArt datasheets already, but I had missed that one. I would have a 
 question, though:
 
 This datasheet gives a lot of information about pinouts on the sensor chip 
 and such good stuff which might be useful if one were constructing a 
 circuit board on which to put the chip. What it does not give, very 
 unfortunately, is any information about the command set which needs to be 
 sent across the USB connection, which in turn actuates the circuits which 
 in turn sends something to the sensor across one of those pins. For 
 example, to set green gain one has to do something on connector X. But how 
 does one send a command from the computer which does something on 
 connector X? Some other datasheets from some other companies (Omnivision, 
 for example) do seem occasionally to provide such information.
 
 Thus, a question for you or for anyone else who reads it:
 
 Has anyone figured out any shortcuts for matching up the missing pieces of 
 information? Probably the answer is no but I think this is the kind of 
 question which is worth asking again on some periodic basis.

I have created some notes about my experiments, but they are only based on
trial-and-error. I started to created a PixArt PAC7301/PAC7302 Wiki page
this morning but the communication protocol details I could found out is
not yet finished. The page can be found at
http://linuxtv.org/wiki/index.php/PixArt_PAC7301/PAC7302 .

I hope I'll have the time to add a section about the communication protocol
details I could find out from the current gspca_pac7302 driver source code
and my experiments.

Regards,

Márton Németh

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Re: PAC7302 short datasheet from PixArt

2010-01-30 Thread Theodore Kilgore



On Sat, 30 Jan 2010, Németh Márton wrote:


Hi,

if anyone interested there is a brief overview datasheet about
PixArt PAC7301/PAC7302 at
http://www.pixart.com.tw/upload/PAC7301_7302%20%20Spec%20V1_20091228174030.pdf


Márton,

First, I am glad that mouse-copying reproduces the accent in your name. If 
you can help explain how to reproduce such things by typing while using 
apine over an ssh connection, using a standard US keyboard, I would be 
glad of the explanation. My wife is Hungarian, and I am thus very 
sensitized to the importance of the question, how to do the accents 
required for writing Hungarian properly.


Now, as to the substance of the mail above, thanks a lot. I had a bunch of 
the PixArt datasheets already, but I had missed that one. I would have a 
question, though:


This datasheet gives a lot of information about pinouts on the sensor chip 
and such good stuff which might be useful if one were constructing a 
circuit board on which to put the chip. What it does not give, very 
unfortunately, is any information about the command set which needs to be 
sent across the USB connection, which in turn actuates the circuits which 
in turn sends something to the sensor across one of those pins. For 
example, to set green gain one has to do something on connector X. But how 
does one send a command from the computer which does something on 
connector X? Some other datasheets from some other companies (Omnivision, 
for example) do seem occasionally to provide such information.


Thus, a question for you or for anyone else who reads it:

Has anyone figured out any shortcuts for matching up the missing pieces of 
information? Probably the answer is no but I think this is the kind of 
question which is worth asking again on some periodic basis.


Theodore Kilgore

PAC7302 short datasheet from PixArt

2010-01-29 Thread Németh Márton
Hi,

if anyone interested there is a brief overview datasheet about
PixArt PAC7301/PAC7302 at
http://www.pixart.com.tw/upload/PAC7301_7302%20%20Spec%20V1_20091228174030.pdf

Regards,

Márton Németh
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